QX1000 Manual III: Extension User's Guide
Appendix: Glossary
QX1000 (SW Version 5.3.x)
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Domain name -
in a network using the TCP/IP, the full domain name consists of a sequence of names (labels) separated by periods (dots), for
example, QX1000.epygi.com.
Domain Name System (DNS)
- a system used on the Internet for translating names of network nodes into their addresses.
Downstream -
in communications, there are two circuits. One coming toward you and the other going away from you. Downstream is another term
for the transmission coming toward you.
Dual-Tone Multifrequency (DTMF) -
a method of signaling consisting of a push-button or touch tone dial that sends out a sound consisting of two
discrete tones that are picked up and interpreted by telephone switches (either PBXs or central offices).
Dynamic Host Configuration Protocol (DHCP)
- a network standard regulating the IP address and other information assogned to the clients by the
server.
Dynamic Host Control Protocol (DHCP)
- a protocol that is used to dynamically allocate and assign IP addresses. DHCP allows you to move
network devices from one subnet to another without administrative attention.
E
E1
- wide area network digital transmission scheme. E1 is the European equivalent of a T1 line. The E1's higher clock rate (2.048 MHz) allows for 32
separate 64Kbps channels, which include one channel for framing and one channel for D-channel information.
Ethernet -
a localarea network used for connecting computers, printers, workstations, terminals, servers, etc., within the same building or campus.
Ethernet operates over twisted pair and/or over coaxial cable at speed up to 10Mbps.
Ethernet Controller
- the unit that connects a device to the Ethernet cable.
Ethernet Switch -
the device that connects local area networks.
Extensions
- users over QX1000.
External User
- users connecting QX1000 by IP or PSTN calls.
F
Firewall
- a combination of hardware and software that limits the exposure of a computer or group of computers to an attack from outside. A firewall
is a system or combination of systems that enforce a boundary between two or more networks. One purpose of an Internet firewall is to provide a
single point of entry where a defense can be implemented, allowing access to the Internet resources from within the organization, and providing
controlled access from the internet to hosts inside the organization’s internal networks.
Firmware -
is computer or OS required software that resides on ROM
Foreign Exchange (FX) -
a Central Office trunk that has access to a distant Central Office. A dial tone is returned from that distant Central Office
and a location can be reached in the area of the foreign Central Office by dialing a local number.
Foreign Exchange Office (FXO)
- a service that can be ordered from the telephone company that provides local telephone service from a central
office that is outside (foreign to) the subscriber’s exchange area. To generate a call from the computer telephony system to the POTS set, you will
need a FXS connection configured. See also FXS.
Foreign Exchange Station (FXS)
- Interface that connects directly to a standard telephone, fax machine, or similar device over a standard RJ-11
modular telephone cable, and supplies ringing voltage, dial tone, and similar signals to it. see FXO
Framing
- A procedure for controlling errors. Consists of inserting bits so the receiver can identify the time slots allocated to each subchannel
G
Gatekeeper -
is the central control entity that performs management functions in a Voice and Fax over IP network and for multimedia applications
such as video conferencing. Gatekeepers provide intelligence for the network, including address resolution, authorization, and authentication
services, the logging of call detail records, and communications with network management systems. Gatekeepers also monitor the network for
engineering purposes as well as real-time network management and load balancing, controling bandwidth, and providing interfaces to existing legacy
systems.
Gateway -
an entrance into and out from a communications network. Technically, a gateway is an electronic repeater that intercepts and steers
electrical signals from one network to another.
Greeting
- voice messages that are played to the QX1000 users or users calling to the QX1000 activating specific services.
H
Hold Music
- music played to the party that is on hold.
Host -
an intelligent device attached to the network; can be also a mainframe computer.
Host Name -
the name given to a mainframe computer or device.
Hunt Grouping -
the QX1000 service that allows configuring several users over QX1000 to ring in series when a specific call arrives.
Hypertext Transfer Protocol (HTTP)
- the protocol used by Web browsers and Web servers to transfer files, such as text and graphics files.
